Cylindrical locks



Nov. 1, 1960 Filed Jan. 19, 1956 J. C. PHILLIPS CYLINDRICAL LOCKS 3Sheets-Sheet 1 V EN TOR.

ATTORNEYS.

NOV? 1, 1960 J. c. PHILLIPS 2,958,553

CYLINDRICAL LOCKS Filed Jan. 19, 1956 s Sheets-Sheet 2 ATTORNEYS Nov. 1,1960 J. c. PHILLIPS 2,958,553

CYLINDRICAL LOCKS Filed Jan. 19, 1956 3 Sheets-Sheet 5 IN V EN TOR.

ATTORNEYS.

rates CYLINDRICAL LOCKS John Carroll Phillips, 1721 W. Crawford St,Tampa, Fla.

Filed .lan. 19, 1956, Ser. No. 560,180

13 Claims. ((Il. 292-169) This invention relates to locks, and morespecifically to a cylindrical door lock of improved construction andoperation.

One of the objects of the present invention is to provide a cylindricallock which may be quickly and easily installed in a door withoutmortising or the inserting of screws. Another object is to provide alock in which there are a combination of levers providing balancedlatching and unlatching action so that the lock may be easily operatedwith a minimum amount of motion and effort. A further object is toprovide a door lock which has less parts and which is easier to assemblethan the conventional door locks presently in use. A still furtherobject is to provide a door lock that has no visible screws or catchesto detract from its appearance after it has been assembled and mountedin a door.

An additional object is to provide a basic lock structure which may beeasily adapted for use as a key-operated lock, a push-button acutuatedlock, a push-button and key-operated combination lock, etc. Anotherobject is to provide a lock which can be operated by reciprocable aswell as rotary motion, so that push buttons or other suitablereciprocating means may be used to retract the bolt or to actuate anemergency release lever carried by the lock. Still another object is toprovide a door lock having a simple and efiective bolt mechanismequipped with a positive-acting dead bolt and composed of a fewer numberof parts than the latch or bolt structures in present use.

Other objects will appear from the specification and drawings, in which:

Figure l is a longitudinal sectional view showing a door lock embodyingthe present invention; Figure 2 is a cross sectional View of the doorlock taken along lines 22 of Figure 1; Figure 3 is a broken longitudinalsectional view showing the parts which hold the lock in a door; Figure 4is a vertical sectional view taken along lines 4-4 of Figure 1; Figure 5is a detailed perspective view showing the bolt retractor actuatinglevers; Figure 6 is a perspective View showing parts of the boltretractor assembly; Figure 7 is a plan view partly in section of theemergency release lever, bolt retractor actuating levers and lockingmember; Figure 8 is a perspective view showing details of the emergencyrelease lever; Figure 9 is an exploded perspective view showing some ofthe members which anchor the lock mechanism within a door; Figure 10 isan exploded perspective view showing a portion of the lock casing andrelated parts; and Figure 11 is a front elevation of the casing for thepresent lock structure.

Referring to the drawings, Figure 1 shows a lock embodying the presentinvention mounted in a door 10 having an outside surface 11, an insidesurface 12 and a front edge 13. To accommodate the lock, door 10 isprovided with a transverse, horizontal bore 14 extending from oppositesides of the door, and a horizontal bore 15 extending rearwardly fromthe front edge of the door and intersecting bore 14 at right angles.

Within bore 14 is a cylindrical casing 16. To facilitate manufacture ofthe casing, and to simplify assembly of the lock, I prefer to formcasing 16 from a pair of identical and abutting cylindrical sections orportions 17 and 18. As shown best in Figures 3 and 10, each section ofthe cylindrical casing has an end wall 19 and a tubular portion orsleeve 20 of reduced diameter extending outwardly therefrom. A passage21 leads from the open ends of the sleeves 20 into the interior ofcasing 16. The annular end walls 19 of the casing are provided withdiametrically opposing slots 22, and an aperture 23 is provided at thejunction of sleeve 20 and end wall 19 of each of the casing segments.The outer curved wall of each of the casing sections 17 and 18 has aslot or opening 24 adapted to receive one of the paired tabs 25 of theC-shaped connecting member 26. This connecting member thereby joins andsecures the casing sections, and also serves as a guide and as amounting for the bolt retracting assembly as will appear shortly.

A pair of discs or circular rose plates 27 are equipped with centralopenings 28 and are adapted to fit over the sleeves 21) of thecylindrical casing 16. These plates have a greater diameter than thecasing 16 and transverse bore 14. As shown most clearly in Figures 4 and10, each of the rose plates 27 is equipped with a pair of inwardlyprojecting tabs 29 having tapered ends equipped with vertically turnedhook portions 30. Figures 3 and 4 show tabs 29 extending through slots22 into the interior of the casing 16. In addition, rose plates 27 maybe equipped with diametrically disposed peripheral tabs 31 which areturned inwardly to define notches 32. Tabs 31 are adapted to engage thecurved walls of bore 14, and the peripheral notches 32 permit theinsertion of hooks 33 on diametrically opposite edges of cover plate 34.Roses or cover plates 34 may, therefore, be hooked or curled over roseplates 27. Roses 34 are provided with central apertures 35 for receivingthe outside and inside spindles 36 and 37, respectively, as shown inFigures 1 and 4. The spindles project into the casing chamber fromopposite sides of door 10, and extend through the central apertures oropenings provided in casing 16, rose plates 27 and roses 34. In the viewpresented in Figure 10, the tubular spindles are shown to have a pair ofinwardly projecting fingers or tabs 38 diametrically disposed at theinnermost ends thereof. Adjacent the inner ends of the spindles 36 and37 are elongated circumferentially extending slots 39 and rectangularapertures 40.

Outside and inside knobs or handles 41 and 42 fit over spindles 36 and37, respectively, and may be provided with knob tabs 43 staked intorectangular apertures 40 to secure the knobs upon the spindles. However,Where the outside knob carries a lock cylinder 46, as represented inFigures 1 and 4, I prefer to secure that upon its respective spindle byother means than by staking, as will presently appear. The lock cylinder46 extends about the curved periphery of a rotatable plug 45, and has anupwardly projecting vane 47 which is accommodated by a longitudinallyextending slot in the spindle and which abuts the inner surface ofoutside knob 41. Vane 47 thereby anchors the lock cylinder to spindle36, and at the same time prevents withdrawal of knob 41 with referenceto the lock cylinder.

An unlocking member 48 generally comprising a flat, elongated plate, hasits outer end fitted into a longitudinal slot 48:: provided by plug 45.A C-shaped washer 48b extends about a circumferential portion of thegrooved periphery of plug 45 and passes through a suitable notch I) (notshown) adjacent the outer end of the unlocking member. It will be notedthat the C-shaped washer 48b abuts the inner end portion of cylinder 46,and that the outer end of plug 45 provides an annular lip 480 incontiguous relation with plug 45, thereby preventing independentlongitudinal movement of the plug, the lock cylinder, and the unlockingmember. A tab 36a (Figure 4) provided by the outside spindle engageslocking member 48 so that knob-41, spindle 36, cylinder 46, plug 45 orunlocking member 48 cannot be separately moved either inwardly oroutwardly with respect to the casing 16. Plug 45 may be rotated withincylinder 46 by any suitable key means. Since the tumbler mechanism ofthe lock cylinder and plug are entirely conventional, illustration anddescription of such mechanism is believed unnecessary here.

Figures 1 and 4 show the outer end of the inside spindle 37accommodating a push button 49 having a normally vertically extendingrib 54 at its outermost end. A Washer 51 is carried by button 49 and hasan upwardly projecting portion 52 which rides in the longitudinal slot52a of the inside spindle 37 when the button is pressed inwardly. Atransversely or circumferentially extending slot 53 intersects thelongitudinal slot 48 and is adapted to receive an upwardly projectingportion 52 and to permit rotational movement of button 49 after thatbutton has been moved inwardly.

Within cylindrical casing 16 is a generally C-shaped cam member 54(Figures 3 and 9) having a curved forward wall 55 and a pair of legs 56extending rearwardly away from the front edge 13 of the door. Each ofthe legs 56 has a pair of cam surfaces or edges 57 which extendrearwardly and outwardly and are defined by a generally V-shaped notch.The angled cam surfaces of member 54 are adapted to engage the hooks 30at the inner ends of the tabs provided by rose plates 27, so that whenthe cam member is moved rearwardly within the cylindrical casing therose plates and covers are clamped tightly against the outside andinside surfaces of door it As best seen in Figure 9, the forward wall 55of the C- shaped cam member is provided with a threaded bore 58 and apair of openings 59 adjacent thereto.

The legs of cam member 54 are adapted to slide rearwardlyover theforwardly extending legs 68 of C-shaped connecting member 26. Asindicated in Figures 10, 9 and 2, the end portions 61 of legs 60' mayproject through the openings 59 of the cam member. Therefore, theslidable cam member may be moved rearwardly within casing 16independently of connecting member 26.

Bore -8 of the cam member threadably receives a bolt 63 which projectsrearwardly through an, aperture 63a in a spindle mounting member 64. Thespindle mounting member 64 is loosely carried by bolt 63 and is equippedwith laterally extending arms '65 having forwardly projecting endportions 66. The outwardly extending arms 65 carry spindle mountingmember extensions 67 which project through openings 67a in the casingsforward wall for engaging the curved wall of bore 14. The forwardlyturned end portions 66 of arms 65 are adapted to be inserted into thecircumferentially extending slots 3% of the outside and inside spindles36 and 37, respectively, as the mounting member is moved forwardlywithin the casing by rotation of bolt 63.

A lock spacing tube 68a extends forwardly within horizontal bore 15 ofthe door and is provided with notched tabs 69 which project through theirregular opening 68 (Figure 11) in the cylindrical casing and throughopenings 59 in the front wall of the cam member. Rotation of tube 68awith respect to case sections 17 and 18 causes the notched tabs 69tocatch and to lock securely upon casing edges 69a adjacent opening 68.

A face plate 70 upon the front edge of door 16 is carried by tube 68aadjacent the front end thereof. An outwardly projecting flange or rim 71about the front edge of tube 68a engages the face plate and secures itupon the tube. Adjacent the forward end of-the tube are a pairofdiametrically disposed apertures 72 which receive the inwardly turnedends 73 of a C-shaped spring 74. As shown in Figure 3, each of theinwardly turned ends of spring 74 is provided with a 45 cam portion 75.

Within the tubular spacing tube 68a is a latch bolt case 76. The latchbolt case has tubular side walls 77 and a forward wall provided with twopair of diametrically disposed slots 78. The paired vertical slotsslidably receive the rearwardly extending arms 79 of a latch boltconnector 88, which is most clearly presented in Figure 6. The mostforward end of the latch bolt connector 80 carries the latch bolt 81which has a curved cam surface 82 for directing the bolt rearwardly intotubular casing 76 when the bolt engages a striker plate (not shown)mounted upon a door frame. It is to be noted that the latch bolt ismounted upon connector 80 for limited reciprocal movement independentfrom the connector.

The paired horizontal slots 78 in the front wall of bolt casing 76accommodate theforward end portions 82 of a dead bolt lever 83 which isshown in Figure 1 as an inverted L-shaped member. A cylindrical deadbolt release lever 84 is mounted for independent sliding movement uponthe back of the L-shaped member. Figure 1 shows the top of the invertedmember, or the most forward portion thereof, equipped with a pointed camportion :85 which rides in a longitudinal slot 86 in the elongated deadbolt. A helical spring 8'7 extends between latch bolt 81 and the leg ofdead bolt lever 83. This spring not only biases latch bolt 81 forwardly,but also tends to pivot or swing the dead bolt lever about a point 88 inorder to seat cam 85 within a V-shaped notch or cam groove 89 adjacentthe forward end of the latch bolt connector 80. However, a dead boltspring 90 which extends from the front wall of bolt casing 76 to therear end of dead bolt release lever 84 biases the dead bolt forwardly,and normally prevents the seating of cam 85' in notch 89.

As shown in Figure 6, a generally C-shaped latch bolt retractor 91 isequipped with claws 52 adapted to engage and secure the rearwardlyextending legs 79 of the latch bolt connector. The latch bolt connectoris provided with a pair of lateral projections or extensions 93 on eachside thereof. These projections preferably curve rearwardly, as shown inFigure 6, to insure smooth and effective operation of the retractingmechanism.

Bolt retractor actuating levers 94 are illustrated in detail in Figure5. Each of the paired levers is identical to theother, and is providedwith a tab 95 at one end having an opening therethrough and a pin 96 atthe opposite end. In addition, each lever has a jog or offset centerportion and a pair of parallel arms 97 and 98 extending in oppositedirections. The levers are mated so that the pin 96 of each extendsthrough the opening in the tab of the other. These pins are rotatablymounted within openings 99 in opposite legs of the G-shaped connectingmember 26.

The latch bolt retractor 91 is slidably mounted between the forwardlyextending legs 66 of the connecting member 26, and is positioned so thatthe paired projections 93 are disposed behind the pivotally mounted boltretractor actuating levers 94. When the large slotted arms 98 of thelevers are swung rearwardly, they engage the projections 93 of the latchbolt retractor, and therefore slide the retractor 91, connector 80 andlatch bolt 81 inwardly or rearwardly.

Both of the pivotally mounted bolt retractor actuating levers may besimultaneously rotated, either by rotation of spindle 36, spindle 37, orlock release lever 48, or by reciprocal movement of asuitable lockreleasing member which will be described shortly. As mentioned above,each of the spindles 36. and 37 is equipped with a pair of inwardlyprojecting tabs or fingers 38. These fingers extend between the arms. 97and 9 8 of the paired actuating levers $4. When a spindleisturned orrotated, one of the fingers thereof forces one of the arms 97'forwardly, while the other finger directs the nearest split arm 94rearwardly toward the back wall of the latch bolt retractor 91. Arms 97and 98 of both actuating levers are thereby forced apart, and theslotted arms 90 are urged against the projections 93 of the retractor.

The unlocking member 48, shown best in Figures 1 and 4, is provided witha pair of inwardly projecting fingers 101 which extend between a pair ofparallel arms 97 and 98 of the actuating members. Therefore, when plug45 is turned, the actuating levers are pivoted in the same manner asthey are rotated by fingers 38 of the spindles. The unlocking member ispreferably provided with a slot '102 to accommodate locking member 103,which will now be described.

The locking member 103 (Figure 1) extends through the inside spindle 37and into the cylindrical casing 16 and the outside spindle 36. One endof the member is staked to the disc 51 carried by push button 49, Whilethe enlarged opposite end thereof is provided with a catch portion 104which is insertable into both the aperture '23 in cylindrical casingsection 17 and into the longitudinally extending slot 105 provided atthe inner end of outside spindle 36. The reduced intermediate portion ofthe locking member is provided with a pair of 45 cam portions 106 and apair of notches 107 between the cam portions and the end of the memberconnected to push button 49. As shown best in Figure 4, a helical spring108 has one end thereof mounted upon unlocking member 48, and theopposite end thereof connected to locking member 103. This compressionspring biases the locking member into the normal position shown inFigures 1 and 4. Another helical compression spring 109 extends betweenthe rear curved wall of cylindrical casing 16 and the back face of latchbolt retractor 91, and urges the retractor, the latch bolt connector,and latch bolt into extended or latched positions.

Figures 1, 2. and 4 show a door lock with a conventional key-operatedlock cylinder mounted within the outside doorknob, and a push buttonsupplied within the inside knob. Since both the inside and outside knobsand spindles are identical in construction, it is to be understood thatthe relative positions of the lock cylinder and push button may bereversed. Furthermore, the lock cylinder 46 and unlocking member 48might be removed completely from the lock and a suitable plug or pushbutton (not shown) substituted therefor.

Figures 7 and 8 illustrate a second embodiment of my invention which isparticularly useful where the lock structure is to be mounted uponinside doors, such as bathroom or bedroom doors. In this embodiment, thelock cylinder 46, plug 45 and unlocking member 43 (illustrated inFigures 1-4) are replaced by a single emergency release lever or member110. This member is composed of a pair of parallel and elongated top andbottom plates 111 which have tapered inner ends 112, and which arejoined at their opposite end and along one side thereof by end plate 113and side plate 114. A pair of intermediate spacing plates 115 convergefrom the top and bottom plates 111 and define a space 116 therebetweenfor slidably receiving the enlarged end of the elongated locking member103. The emergency release lever is thereby mounted at right angles tothe locking member 103 and is disposed so that its pointed or taperedends 112 project between a pair of arms provided by the bolt retractoractuating levers 94. Inward movement of the emergency release lever willthus wedge or separate adjacent arms 97 and 98 of the actuating levers,and cause the retraction of latch bolt 81. Helical spring 117 abutsspacing plates 115 and unlocking member 40, and urges the emergencyrelease member into the normal position shown in Figure 7. Knob 118 isprovided with a slot or opening 119 so that a suitable key or unlockingdevice (not shown) may be inserted through the opening to force theemergency release member inwardly, and to thereby unlock the door.

Operation Since the operation of the parts responsible for holding thelock in the door has already been discussed in detail with reference tothe structure of the specific parts, a brief summary of this operationis believed sufficient. To mount the lock in door 10, all of the partsexcept the bolt mechanism, the lock spacing tube 68a, the insidedoorknob 42 and the inside spindle 37, inside rose plate 27 and insiderose 34 are inserted into the transverse horizontal bore 14 from theoutside surface 11 of the door. The lock spacing tube 68a, C-shapedspring 74 and face plate are then inserted into the intersectinghorizontal bore 15 from the front edge 13 of the door. Lock spacing tube68a is then rotated so that the notched tabs 69 at the rear end thereofengage or catch the edges 69a adjacent opening 68 in the front Wall ofthe case 16. The inside rose plate, doorknob and spindle .are theninserted into the case in such a manner that tabs 29 of the inside roseplate project through slots 22 of the cylindrical case and so thattransverse slot 39 of the inside spindle is moved into alignment withthe forwardly projecting end portion 66 of the spindle mounting member64. Bolt or screw 63 is then tightened.

As the bolt is tightened, the spindle mounting member 64 and the'C-shaped cam member 54 are moved towards each other. The rearwardly andoutwardly extending cam edges or surfaces 57 of member 54 engage tabs 29of the rose discs or plates, and direct these plates and their connectedcovers or roses inwardly against the inside and outside surfaces of thedoor. It is believed apparent, therefore, that the door lock of thepresent invention may be easily mounted in a variety of doors havingdifierent thicknesses.

While the cam member moves rearwardly, the spindle mounting member 64travels forwardly so that the forwardly turned end portions 66 pass intothe transverse or circumferential openings 39 in each of the spindles 36and 37. These spindles and the doorknobs staked thereon are therebyrotatably secured to the lock casing 16.

As bolt 63 is tightened, the spindle mounting member extensions 67carried by member 64 travel forwardly through openings 67a in the curvedwall of the cylindrical casing, and abut door 10. Further tightening ofthe bolt drives the entire lock casing rearwardly against the rear wallof transverse bore 14, thereby staking the pointed tabs 25 of member 26into the door and, at the same time, retracting the lock spacing tube68a into the smaller horizontal bore 15. The lock is thereby firmlyclamped within the door by movement in four directions produced by therotation of a single bolt or screw 63.

To install the bolt mechanism, the bolt case 76 and all parts containedtherein are inserted into the lock spacing tube 68a so that the ends ofthe legs of the latch bolt connector 80 enter case 16. The bolt case isthen rotated to bring the slots 92a of the latch bolt connector intovertical alignment with fingers or claws 9'2 (Figure 6), and theC-shaped spring 74 with its inwardly turned ends locks the bolt case andbolt mechanism within the tube 6801. When either the inside or outsideknob is rotated, the inwardly projecting tabs 38 upon the spindlescarried by the particular knob force arms 97 and of the bolt retractoractuating levers 94 apart. Both of the slotted arms 98 pivot rearwardlyto engage the latch bolt retractor 91, thereby retracting the latch bolt81. To lock the door, push button '49 in the inside doorknob isdepressed so that the locking member 103 is driven inwardly. The pair ofadjacent arms of the actuating levers nearest the inside doorknob 42catch in the intermediate notches 107 behind the 45 cam portions 106 ofthe locking member carried between the arms. At the same time, tab 104of the enlarged portion of the locking member moves into aperture 23 ofthe cylindrical casing and into slot 105 of the outside spindle 36. Aninterlock is thereby formed between the outside spindle and the lockcasing to prevent rotation of that spindle and outside knob.

The door may be unlocked by pivoting bolt retractor actuating levers 94until arms 97 are free of notches 107 in the locking member H33. Whenthe bolt retractor actuating levers are rotated in this manner, spring108 urges the locking member 103 toward inside knob 42 and into thereleased position shown in Figure 1. The bolt retractor actuating leversmay be rotated and moved to released position by inserting a suitablekey into the lock cylinder 46 carried by the outside spindle 41, andturning the key to rotate unlocking member 48. A similar result may beaccomplished by turning the inside knob 42 or pushing an emergencyrelease lever (Figures 8 and 7).

If it is desired to maintain member 103 in a locking position, pushbutton 49 may be depressed and then rotated to bring the upwardlyprojecting portion or tab 52 of Washer or disc 51 into the transverseslot 53 of the inside spindle. When the push button is rotated in thismanner, spring 108 cannot retract the locking member 103 even after thedoor has been unlocked by rotation of the inside knob or by the turningof unlocking member 48.

The bolt retractor actuating levers 94 may be operated by reciprocalmotion as well as by rotary motion, as shown in the second embodiment ofmy invention represented in Figures 7 and 8. As the tapered emergencyrelease lever 110 is pushed inwardly, the actuating levers are wedgedapart and bolt 81 is thereby retracted. While I have shown the emergencyrelease lever adapted to be operated by a suitable key, it is believedevident that such a lever might also be actuated by pushbu-tton means.

As door 10 is closed, the strike plate (not shown) mounted upon the doorcasing engages the curved surface 82 of bolt 81 and forces the boltinwardly along with dead bolt release lever 84. Preferably, the openingin the striker plate is large enough to accommodate only the bolt 81 sothat when the door is closed, dead bolt release lever 84 remains in aretracted position. Spring 87 not only urges bolt 81 into the openingprovided by the striker plate and door casing, but also pivots dead boltlever 83 about pivot point 88. As a result, the pointed cam portion 85of lever 83 is directed into the groove 89 provided by latch boltconnector 80. Force applied directly to bolt 81 will serve only to bringthe bolt into abutting relation with the outer end of lever 83 and willnot produce retraction of that bolt. A safety feature is therebyprovided since bolt 81 can be retracted only by rotation of the pairedbolt retractor actuating levers 94. As the bolt retractor actuatinglevers are pivoted, the V-shaped cam groove or notch 89 of the latchbolt connector 84) cams dead bolt lever 90 into the position shown inFigure 1, thereby permitting the retraction of the latch bolt.

While I have disclosed the embodiments of my door lock in considerabledetail, it will be understood by those skilled in the art that thesedetails may be varied considerably without departing from the spirit andscope of my invention.

I claim:

1. A door lock comprising a casing adapted to fit within a bore providedwithin a door and having at least one slot in each of a pair of oppositewalls thereof, a pair of plates movable inwardly towards each other andeach being provided with at least one inwardly projecting tab adapted toextend into said casing through one of said slots, a cam member beingmovably mounted within said casing for movement in a directiontransverse to the direction of movement of said plates and beingprovided with cam surfaces engageable with the tabs of both of saidplates for simultaneously drawing said plates inwardly against said doorupon transverse movement of said cam member, andmeans for transverselymoving said cam member within said casing.

2. The structure of claim 1 in which said cam member'is *C-shaped and isprovided with a front wall and a pair of legs extending rearwardlytherefrom, said legs each having a V-shaped notch at the rear portionthereof to provide rearwardly and outwardly angled cam surfaces adaptedto engage'the tabs of said plates.

3. The structure of claim 1 in which said door lock is provided with apair of roses, each being mounted upon one of said plates so that saidroses are drawn inwardly as said cam member is moved transversely withreference to the inward movement of said plates.

4. A door lock comprising a casing adapted to be carried within a boreprovided in a door and having a pair of central openings in oppositewalls thereof, said casing also having a pair of slots adjacent each ofsaid central openings, a pair of plates each having a central openingtherethrough and being equipped with a pair of inwardly projecting tabsadapted to extend into said casing through said slots, a pair ofspindles each extending into said casing through the central opening inone of said plates and in one of said casing walls, a movable cam memberwithin said casing, said cam member being adapted to engage the tabs ofsaid plates and urge said plates inwardly as said cam member is movedrearwardly, a spindle mounting member movably mounted within said casingand being adapted to engage the inner end portions of said spindles assaid mounting member is moved forwardly, and means for simultaneouslymoving said spindle mounting member forwardly and said cam memberrearwardly within said casing.

5. The structure of claim 4 in which said means comprises bolting meansrotatably mounted on one of said members and threadably secured to theother of. said members, whereby upon rotation of said bolting means saidcam member and said spindle mounting member are moved in oppositedirections.

6. The structure of claim 4 in which said casing is provided with anopening in the forward wall thereof, said spindle mounting member beingequipped with extension portions projecting forwardly towardsaid-forward opening, whereby, when said mounting member is movedforwardly, said portions are carried through said opening into abuttingrelation with said door to ancho said casing within said bore. 7

7. The structure of claim 4 in which said door is provided with a secondbore extending rearwardly from the edge of said door and intersectingsaid first mentioned bore, a tube detachably mounted upon said casingand movably carried within said second bore, said tube being movedrearwardly within said second bore as said cam member is movedrearwardly within said casing.

8. A door lock comprising a casing adapted to fit within a bore providedwithin a door and having at least one slot in each of a pair of oppositewalls thereof, a pair of plates movable inwardly towards each other andeach being provided with at least one inwardly projecting tab adaptedtoextend into said casing through one of said slots, a cam member beingmovably mounted within said casing for movement transverse to thedirection of movement of said plates and being. provided with camsurfaces engageable with the tabs of said plates for simultaneouslydrawing both of said plates inwardly against said door when said cammember is moved transversely, means for moving said cam member withinsaid casing to urge said cam surfaces into engagement with said tabs, alock spacing tube being movably carried within a second bore of saiddoor and being detachably mounted upon said casing, and means for movingsaid tube and casing rearwardly within the bores provided in said door.

9. The structure of claim 8 in which said first mentioned meanscomprises a screw threadably secured to said cam member and carrying alaterally elongated member adjacent the rear end thereof, said casingbeing provided with openings in the front wall thereof, said movablemember being provided with extensions adapted to project forwardlythrough said openings whereby, upon rotation of said screw, saidlaterally elongated member and said cam member are simultaneously movedforwardly and rearwardly respectively, said extensions being driventhrough said openings into abutting relation with said door to urge saidcasing and tube rearwardly within said bores.

10. A door lock comprising a cylindrical casing adapted to fit within acylindrical bore within a door and having a pair of openings in oppositeend walls thereof, a pair of spindles each extending into said casingthrough one of said openings, each of said spindles being equipped witha circumferentially extending slot adjacent the inner end thereof, aspindle mounting member being movably secured within said casing andhaving forwardly projecting arms, said arms being engageable with theslots of said spindles when said member is moved forwardly and beingadapted to release said spindles when said member is moved rearwardly,means for moving said member rearwardly and forwardly within saidcasing, said casing being provided with openings in the forward wallthereof, and extension members carried by said spindle mounting memberand projecting forwardly through the openings in the forward wall ofsaid casing, whereby, when said spindle mounting member is movedforwardly, said extension members are carried through said openings intoabutting relation with said door within said cylindrical bore.

11. A door lock comprising a cylindrical casing adapted to fit within acylindrical bore within a door and having a pair of openings in oppositeend walls thereof, a pair of spindles each extending into said casingthrough one of said openings, each of said spindles being equipped witha circumferentially extending slot adjacent the inner ends thereof, afirst member movably secured within said casing and having forwardlyprojecting arms, said arms being engageable with the slots of saidspindles when said member is moved forwardly and being adapted torelease said spindles when said member is moved rearwardly, a secondmember mounted within said casing and adapted to urge said casingrearwardly within said bore when said second member is shiftedrearwardly, a threaded shaft threadedly connecting said first and secondmembers for moving the same towards and away from each other when saidshaft is rotated, said casing being provided with openings in theforward wall thereof, and extensions carried by said first member andextending forwardly through said openings in the forward wall of saidcasing for abutting the door within said bore when said shaft is rotatedto move said first and second members towards each other, whereby, whensaid shaft is rotated to move said members towards each other after saidextensions abut said door, said second member moves rearwardly to shiftsaid casing rearwardly within said bore.

12. The structure of claim 11 in which a lock spacing tube is detachablymounted upon said casing and is drawn rearwardly into a second boreprovided by said door when said second member is moved rearwardly.

13. A door lock comprising a cylindrical casing adapted to be mountedwithin a recess of a door and having openings through opposite endsthereof, a pair of rotatable spindles each projecting into said casingthrough one of said openings, a pair of spaced clamping plates carriedby said casing and movable towards each other for engaging oppositesides of said door and for securing said casing within said recess, aspindle mounting member and a cam member movably mounted within saidcasing for movement towards and away from each other, means forselectively moving said spindle mounting and cam members towards andaway from each other, said spindle mounting member having portions whichengage and lock said spindles against axial movement relative to saidcasing upon movement of said cam member, said cam member having camsurfaces which engage portions of both of said clamping plates and urgethe same towards each other and into engagement with opposite sides ofsaid door upon movement towards said spindle mounting member.

References Cited in the file of this patent UNITED STATES PATENTS1,876,885 Ellingson Sept. 13, 1932 2,076,125 Grimsrud Apr. 6, 19372,538,688 Heyer Jan. 16, 1951 2,650,122 Welch Aug. 25, 1953 2,711,920Farnsworth June 28, 1955 2,726,891 Gresham et al. Dec. 13, 19552,730,391 Rayburn Jan. 10, 1956 2,742,310 Russell Apr. 17, 19562,795,948 Rayburn June 18, 1957

